Earth:San Timoteo Formation
| San Timoteo Formation | |
|---|---|
| Type | Formation |
| Location | |
| Region | California |
| Country | United States |
The San Timoteo Formation, also called the San Timoteo Beds, is a geologic formation in California.
History
Part of the wider San Timoteo Badlands, San Timoteo Formation was initially excavated in San Timoteo Canyon under by a team sponsored by Childs Frick from 1916 to 1921.[1][2]
Geology
The San Timoteo Formation represents Pliocene and Early Pleistocene sediments, mostly sandstone. The Formation overlies the late Miocene and early Pliocene Mt. Eden Formation (Jack Rabbit Trail & Eden Hot Springs localities, corresponding to the Hemphillian and Blancan faunal stages).[2]
Fossils
Fossils of Irvingtonian prehistoric mammals were found in the San Timoteo Formation (El Casco, Mammoth and Shutt Ranch localities).[2][3][4][5] These include:
- Canis edwardii (Edward's wolf)
- Microtus sp. (vole)
- Ondatra idahoensis (muskrat)
- Mictomys kansasensis (bog lemming)
- Erethizon cascoensis (porcupine)
- “Plesippus” fracescana (three-toed horse)
- Equus bautistensis (horse)
- Tapirus merriami (tapir)
- Odocoileus cascaensis (deer)
- Megalonyx sp. (ground sloth)
- Mammuthus sp. (mammoth)
- Possibly a giant bear (may be either Arctodus or Agriotherium)[6]
Fossils have also been recovered from the El Casco Substation locality, which was dated to 1.4Mya. Recovered specimens include Smilodon gracilis, Homotherium, two ground sloths, two types of camels, a llama, horse, and deer. Plant fossils include birch, pine, sycamore and oak trees.[7][8][9]
See also
- List of fossiliferous stratigraphic units in California
- Paleontology in California
References
- ↑ "The Bone Mine". The Banning Record: pp. 2. 1918-03-07. https://www.newspapers.com/article/the-banning-record-the-bone-mine/135338030/.
- ↑ 2.0 2.1 2.2 Albright, L. Barry; Kendall, Jr., Arthur (2000-08-03). Biostratigraphy and Vertebrate Paleontology of the San Timoteo Badlands, Southern California. University of California Press. doi:10.1525/california/9780520098367.003.0001. ISBN 978-0-520-09836-7. http://california.universitypressscholarship.com/view/10.1525/california/9780520098367.001.0001/upso-9780520098367.
- ↑ "San Timoteo Badlands". https://www.utep.edu/leb/pleistnm/sites/santimoteo.htm.
- ↑ "Big Pine Citizen 2 March 1918 — California Digital Newspaper Collection". https://cdnc.ucr.edu/?a=d&d=BPC19180302.2.28.
- ↑ McComas, Katie (8 May 2019). "Paleontological Records Search – Gilman Springs Median and Shoulder Widening Project". https://static1.squarespace.com/static/5b7321a489c17291c4fd7b75/t/622b945e6eddcc15103a5a88/1647023200780/PaleontologicalRecordsSearchMemo_May2019.pdf.
- ↑ Scott, Eric; Cox, Shelley M. (May 24, 1993). "Arctodus simus (Cope, 1879) from Riverside County, California". PaleoBios 15 (2): 27–36. https://ucmp.berkeley.edu/science/paleobios/backissues/v15no2_scott&cox.pdf.
- ↑ "The Associated Press: Calif. utility stumbles on 1.4M-year-old fossils". 2010-09-24. http://www.google.com/hostednews/ap/article/ALeqM5hUkul_DVGCUiaQPkJB51InmsCnrAD9IC5GN80.
- ↑ "El Casco Substation" (in en-US). https://lsa.net/project/el-casco-substation/.
- ↑ "Southern California Edison Discovers Most Comprehensive Collection of Fossils of its Era in Southern California" (in en). https://newsroom.edison.com/releases/southern-california-edison-discovers-most-comprehensive-collection-of-fossils-of-its-era-in-southern-california.
- ((Various Contributors to the Paleobiology Database)). "Fossilworks: Gateway to the Paleobiology Database". https://www.fossilworks.org/.
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